Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5413033 | Journal of Molecular Liquids | 2010 | 9 Pages |
Abstract
Synthesis, characterization and thermal properties of a series of four azomethines (1)-(4) derived from 4-biphenyl carboxaldehyde were described. The structures of the azomethines were characterized by means FTIR, 1H, 13C NMR spectroscopy and elemental analysis; the results show an agreement with the proposed structure. The methods of differential scanning calorimetry (DSC) and polarizing optical microscopy (POM) were used to describe the liquid-crystalline properties of the azomethines. The mesomorphic properties of the compounds depend on the amine used in the synthesis of imines. In particular, three of them prepared from 4-hexadecylaniline, 4-decylaniline or 4-((4-aminophenyl)diazenyl)-N,N-dimethylbenzenamine (1)-(3) showed smectic A and smectic X mesophases, while the last one obtained from 4-(heptadecafluoroctyl)aniline (4) exhibited SmX2 and nematic mesophases. Current-voltage measurements were performed on ITO/compound/Alq3/Al device with two different thicknesses of the film. Additionally, we compared the mesomorphic behavior of the azomethines presented in this work with another azomethines.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Agnieszka Iwan, Henryk Janeczek, Marian Domanski, Patrice Rannou,